t-head/thead-kernel
1
0
Fork 0
mirror of https://github.com/revyos/thead-kernel.git synced 2026-06-21 09:12:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

virtio_vdmabuf: dma skip cpu sync if buf flag has VIRTIO_VDAMBUF_NONCACHED optimize cpu usage for nonecached dma buf used in g2d gpu vpu etc.

Browse Source 
Change-Id: I191ebe6ad748dc9cb8f1946d1e51f6d606bde182
Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
This commit is contained in:
hlb194802
2024-04-15 03:11:58 +00:00
committed by Han Gao
parent 8e7282e217
commit 3bff12eab2
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/virtio/virtio_vdmabuf.c
View File

@@ -165,7 +165,8 @@ static int sg_table_map(struct device *dev, struct virtio_vdmabuf_buf *exp_buf,
case VIRTIO_VDMABUF_HEAP_TYPE_SYSTEM:
case VIRTIO_VDMABUF_HEAP_TYPE_SYSTEM_CONTIG:
/* SYSTEM, SYSTEM_CONFIG has the same logic */
if (dma_map_sgtable(dev, sgt, dir, 0)) {
if (dma_map_sgtable(dev, sgt, dir, exp_buf->flags &
VIRTIO_VDAMBUF_NONCACHED ? DMA_ATTR_SKIP_CPU_SYNC : 0)) {
dev_err(dev, "[%s:%d] error\n",
__func__, __LINE__);
sg_free_table(sgt);
@@ -204,7 +205,8 @@ static int sg_table_unmap(struct device *dev, struct virtio_vdmabuf_buf *exp_buf
case VIRTIO_VDMABUF_HEAP_TYPE_USER:
case VIRTIO_VDMABUF_HEAP_TYPE_SYSTEM:
case VIRTIO_VDMABUF_HEAP_TYPE_SYSTEM_CONTIG:
dma_unmap_sgtable(dev, sgt, dir, 0);
dma_unmap_sgtable(dev, sgt, dir, exp_buf->flags &
VIRTIO_VDAMBUF_NONCACHED ? DMA_ATTR_SKIP_CPU_SYNC : 0);
break;
case VIRTIO_VDMABUF_HEAP_TYPE_CARVEOUT: